Wikipedia (pronounced /ˌwɪkɨˈpiːdi.ə/ WIK-i-PEE-dee-ə) is a multilingual, web-based, free-content encyclopedia project based on an openly-editable model. The name "Wikipedia" is a portmanteau of the words wiki (a technology for creating collaborative websites, from the Hawaiian word wiki, meaning "quick") and encyclopedia. Wikipedia's articles provide links to guide the user to related pages with additional information.
Visit - http://www.wikipedia.org/
Visit - http://encyclopedia.thefreedictionary.com/
Wikimedia foundation. Wikimedia is owned and operated by the Wikimedia Foundation, a non-profit foundation dedicated to bringing free content to the world.
The various Wikimedia projects are listed below: You can login to the following wikisites from wikimedia page.
Wikipedia - http://www.wikipedia.org/
Wiktionary - http://www.wiktionary.org/
Wikiquote - http://www.wikiquote.org/
Wikimediafoundation - http://wikimediafoundation.org/
Wikibooks - http://www.wikibooks.org/
Wikisource - http://wikisource.org/
Wikinews - http://www.wikinews.org/
Wikiversity - http://www.wikiversity.org/
Wikispecies - http://species.wikimedia.org/
Mediawiki - http://www.mediawiki.org/
Wikimedia metawiki - http://meta.wikimedia.org/
Wikimedia commons - http://commons.wikimedia.org/
Wikimedia Incubator - http://incubator.wikimedia.org/
Answers.com marries the best of community-driven questions and answers with hundreds of respected and trusted editorial reference books. The site knows the best answer to give you, whether it summons the expansive, ever-growing collection of community answers from WikiAnswers, or it taps into its ReferenceAnswers database, a comprehensive set of editorial, licensed reference topics.
Visit - http://wiki.answers.com/
Wikia is a collaborative publishing platform that enables communities to discover, create and share content on any topic in any language.
Visit - http://www.wikia.com/
Wikibooks (previously called Wikimedia Free Textbook Project and Wikimedia-Textbooks) is a Wiki hosted by the Wikimedia Foundation for the creation of free content textbooks and annotated texts that anyone can edit.
Visit - http://www.wikibooks.org/
Wikibabel is a free-content, web-based, user editable pool of language learning resources focusing on audio content. Wikibabel aims at providing high quality podcast-like language lessons.
Wikibabel aims to become a useful resource in the following domains:
# free language lessons available to anyone, from any language to any other
# minor language and dialects conservation, including non-written forms.
Visit - http://www.wiki-babel.org/
Wikibon is a professional community solving technology and business problems through an open source sharing of free advisory knowledge. By combining Web 2.0 technology, global expertise and action-oriented content, Wikibon has become the Web's first and largest technology research and advisory organization where peers help each other make better technology investment decisions and share best practices.
Visit - http://wikibon.org/
Since 1995, Refdesk is a free and family-friendly web site that indexes and reviews quality, credible, and current web-based resources.
Visit - http://www.refdesk.com/
Useful wiki website for investors
Visit - https://www.wikinvest.com/
A collaborative guide about cars and all things automotive.
Visit - http://wikicars.org/
Wikicompany is a free content licensed worldwide business directory that anyone can edit.
Visit - http://wikicompany.org/
WikiCU is a wiki with articles related to Columbia University and its neighborhood. It is effectively an insider's guide to Columbia University.
Visit - http://www.wikicu.com/
Wikidot.org is a stable, mature and free product that allows you to run a single wiki or host big farms of wikis on a regular Linux computer. Wikidot.org is the official open source version of the Wikidot.com software. Wikidot.org software is available for free to everyone under the Affero General Public License v3.
Visit - http://www.wikidot.org/
The world's collaborative how to manual.
The how to manual that you can edit.
Visit - http://www.wikihow.com/
WikiHealth is a collaborative writing project aiming to build an extensive and valueable repository on a variety of health and wellness topics. Its mission is to bring free, accesible and thorough information on health and wellness into the homes of every individual worldwide. The goal is for new articles on any health and wellness topic to be added regularly and for existing articles to be improved by volunteer contributors. In time, we envision WikiHealth to be the best health resource to come to for unbiased information as well as perscriptive advice on any health or wellness topic.
Visit - http://www.wikihealth.com/Main_Page
World map - Wikimapia
Let's describe the whole world - http://wikimapia.org/
Free book summaries that anyone can contribute to! WikiSummaries.org provides free summaries of books, plays and other written documents.
Wikisummaries - http://www.wikisummaries.org/
Wiki Newforum - http://www.wikinewforum.com/